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Journal of Flow Visualization and Image Processing
SJR: 0.161 SNIP: 0.312 CiteScore™: 0.1

ISSN Imprimer: 1065-3090
ISSN En ligne: 1940-4336

Journal of Flow Visualization and Image Processing

DOI: 10.1615/JFlowVisImageProc.v9.i2-3.70
18 pages

REVERSE FLOW PHENOMENON IN A ROTATING DIFFUSER

Brane Sirok
Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, P.O. Box 394, SI - 1000 Ljubljana, Slovenia
Tom Bajcar
Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, P.O. Box 394, SI - 1000 Ljubljana, Slovenia
Matevz Dular
Faculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, P.O. Box 394, SI - 1000 Ljubljana, Slovenia

RÉSUMÉ

A study of the reverse flow phenomenon at the outlet of a rotating axial diffuser with a circular cross-section is presented in the paper. Measurement of the flow velocity components was performed by the LDA system. In addition, computer-aided visualization of the flow structures was carried out. The results showed a certain dependence of the position and size of the recirculation zone in the diffuser outlet transverse section on the amount of airflow and on the rotating frequency of the diffuser. The computer-aided visualization method proved to be more suitable for detecting the position and shape of the reverse flow regions.